Dell (accidentally?) released some information about an upcoming 27" LCD display on its website: the W2707C:
In a conversation to DailyTech, a Dell representative explained that the image came from a training manual for the upcoming W2707C display. This was later confirmed by a forum post from a Dell employee on the same day. As far as Dell displays go, the "C" suffix denotes a consumer LCD TV. Dell's W2607C, for example, is a 26" LCD TV.
Typically Dell announces its new displays and roadmaps at the Consumer Electronics Show: the 3007WFP, 2407WFP and 2007WFP were all highlights of CES 2006. CES 2007 is scheduled to take place the second week of January.
The Dell W2707C display features a resolution of 1920 x 1200 pixels. More info and a picture at DailyTech.